4. Subjects have adequate bone marrow, renal, and hepatic function as follows: Bone marrow: Absolute neutrophil count (ANC) >/= 1,500/mm3 Platelets >/= 100,000/mm3; Hemoglobin >/= 9.0 g/dL Renal function: Serum creatinine </= 1.5 times the upper limit of the institution's normal range Hepatic function: Bilirubin, aspartate aminotransferase (AST), and alanine aminotransferase (ALT) </= 1.5 times the upper limit of the institution's normal range. Subjects with liver metastasis may have an AST and ALT of </= 5.0 x the upper limit of normal.